End-to-End ADU Construction

We help make your dream ADU a reality. Our team builds it right, navigating every step with the utmost quality standards.

Extra space for endless possibilities

Build the ADU of your dreams

Create lasting


Invest in what truly matters—quality time with family and loved ones.

A private space for friends and family to stay.

Embrace your


A dedicated space to foster creativity, relaxation and balance.

Unlock the full potential of your property with an ADU rental unit.

Invest in


The key to unlocking your property’s potential.

The perfect spot to enjoy your hobbies or creative endeavors.

Trusted ADU Contractors in Southern California

Our all-inclusive services streamline the stages of your ADU project, ensuring a stress-free journey while saving you time and money.

Fully-managed construction

We seamlessly manage site preparation, material procurement, construction, and city inspections.


In-house pro licensed builders

Build stress-free with local ADU experts who guarantee top-quality construction and code compliance.

All-in project financing

We help you find the loan that fits your budget and goals, financing your entire project from start to finish.

All-in project financing
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Price-lock guarantee

Lock in a stress-free budget and timeline for your project. Guaranteed price with clear milestones.

Our Projects

Explore our clients' success stories and learn how we helped bring their vision to life.

A Success Story of Seamless Construction

San Diego, CA

Mrs. Ojare saw an opportunity to create passive income by investing in an ADU on her property. However, navigating the permitting process proved to be her biggest hurdle.

“I think they are the ones to go to if you’re having this kind of project, and yeah, they deliver what they promise”. -Mrs. Ojare

Our ADU Construction Process

Experience a seamless ADU construction process. Our experts manage every step, ensuring a smooth journey to a beautiful and functional ADU.

Pre-construction meeting and site visit

Your project team comes together to gather crucial information that will inform the design and ensure a smooth construction process.

Site prep

The crew clears away any debris or structures, grading the land for a level foundation, and trenching to install essential utilities.

Underground utilities installation

This phase involves installing essential services like water, sewage, and electrical lines beneath the ground at your ADU construction site.


Here the groundwork is laid by excavating, forming, and pouring concrete to create the foundation for your new living space.

Framing and MEPs

Walls, floors, and a roof are constructed. Next, the essential systems – mechanical, electrical, and plumbing – are installed to full functionality.

Interior and exterior finishes

Aesthetics like flooring, painting, fixtures, and appliances are worked. For the exterior, siding, roofing, and gutters receive their final touches.

Landscaping (additional contract)

We'll finalize the grading, install patios, walkways, and retaining walls – then work with your chosen plants to create a beautiful outdoor space.

Final inspection

Local authorities ensure your ADU meets all safety codes, zoning regulations, and quality standards, giving you peace of mind and a valuable addition to your property.

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Explore our flexible financing solutions designed specifically for ADU projects

ADU Floor Plan Catalog

Maximize your investment with our pre-designed and fully customizable models, whether you're building for your family, rental income, or just additional space.

Talk to an ADU Expert

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Have questions? Here are a series of frequently asked questions to clarify the ADU construction process.

How much does it cost to build an ADU in California?

The average cost of building an Accessory Dwelling Unit in California can range from $120,000 to $350,000+.

The final cost of your ADU will depend on several factors, such as the size of the unit, the zoning regulations in your area, the number of bedrooms, and the type of ADU you choose to build. Also, the average cost per sqft may vary depending on your city, but in California it usually ranges from $345psf – $425psf. 

Does adding an ADU increase the value of your property? 

Yes, according to the National Association of Realtors (NAR), adding an ADU to your property can increase its value by 35%. 

The impact of adding an ADU to your property can vary depending on several factors, including the location, size, and quality of the unit. However, there are numerous reasons why adding an ADU can significantly boost the value of your property.

Do You Need A Permit To Build An ADU?

Yes, obtaining a permit is required to build an ADU in California. 

The process may vary depending on your location and the specific regulations of your city. However, a permit is required before starting any construction or renovation work.

What are the construction stages an ADU goes through?

  • Pre-Construction Meeting and Site Visit: During this phase, your project team, which may include contractors, designers, and often city officials, gathers to discuss project specifics and inspect the construction site. Additionally, this stage addresses specific site requirements essential for the construction process.
  • Underground Utilities: This phase involves installing essential services like water, sewage, and electrical lines beneath the ground at your ADU construction site. This step is critical as it ensures that your ADU will have access to vital utilities.
  • Foundation: The foundation phase is the basis of your ADU construction. It's where the groundwork is laid, both literally and figuratively. During this stage, the foundation is built, which serves as the structural base for your ADU.
  • Framing: This is where your project truly takes shape, as the framing is pretty much the skeleton of your new living space. During this stage, the walls, floors, and roof are built to provide the basic structure for your ADU.
  • MEPs: The MEP (Mechanical, Electrical, and Plumbing) phase is essential in ADU construction. It involves installing heating, ventilation, and air conditioning systems for climate control, setting up electrical wiring and lighting, and establishing plumbing for water supply, drainage, and sewage.
  • Interior & Exterior Finishes: The Interior and exterior finishes phase brings your ADU to life. It includes adding final indoor aesthetic touches and landscaping/hardscaping to enhance your ADU's visual identity and functionality.
  • Final inspection: During the final inspection phase, local authorities conduct thorough assessments to verify your ADU's compliance with safety codes, zoning regulations, and quality standards. Successful inspections indicate readiness for occupancy and adherence to all legal requirements, marking the completion of your Accessory Dwelling Unit!

How does Multitask help with building my ADU?

We fully manage site preparation, material procurement, the actual construction of your uint and city inspections so you can enjoy a stress-free ADU journey with local experts that ensure top quality and code compliance.

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